Electric furnace.



Patented Sept. 25, I900.

C. S. BRADLEY.

ELECTRIC FURNACE.

(Applicntion filed Feb. 10, 1900.)

2 Sheets-Sheet I.

(No Model.)

IIIII w/Z/v/emwew iiaz/enivrr No. 658,698. Patented Sept. 25, I900.

c. s. BRADLEY.

ELECTRIC FURNACE.

(Application filed Feb. 10, 1900.) (No Model.) 2 Sheets-Sheet z.

UNITED STATES PATENT OFFICE.

CHARLES S. BRADLEY, OF NEW YORK, N. Y., ASSIGNOR TO THE OYANIDE COMPANY, OF AMPERE, NEW JERSEY.

ELECTRlC FU RNACE.

SPECIFICATION forming part of Letters Patent No. 658,698, dated September 25, 1900.

Application filed February 10, 1900. Serial No. 4,717. (No model.)

T at whom it may concern tating the annular receptacle, the mechan- Be it known that I, CHARLES S. BRADLEY, ism as so far described being similar to that a citizen of the United States, residing at New shown in the patent above referred to. To York, in the county of New York and State embody myinvention inthis apparatus, pipes 5 of New York, have invented certain new and or tubular connections 8 may be provided at usefullmprovements in Electric Furnaces, of a plurality of points in the annular rim and which the following is a specification. communicating with a hollow bore in the Thisinvention relates to an electric furnace shaft 1, said bore being connected by a pipe 9 which is particularly designed to carry out with a suitable source of nitrogen under pres- I0 the process disclosed and claimed in United sure, here indicated as a tank 10. Valve de- States application, Serial No. 712,054, filed vices are provided for cutting off the supply April 7, 1899, by Charles E. Jacobs. of nitrogen from those parts of the annular The invention comprises a furnace of the rim which are unoccupied by carbid material, moving-receptacle type shown in United and for this purpose I have shown a valve 15 States PatentNo. 597,945, granted to me Janformed by an extension 11 of pipe 9, which,

uary 25,1898, in combination with means for being stationary, acts as a valve-stem in cosupplying gas to such moving receptacle at a operation with the openings of pipes 8, so that definite part of its movement, so as to effect the nitrogen is admitted to the carbid maa particular reaction. In the present case terial (indicated at 00) shortly after the pro- 20 the construction is designed with particular duction of the carbid between the electrode reference to the production of cyanids by the terminals and after the material has begun reaction on carbids immediately subsequent to cool and the supply of nitrogen is mainto the production of such carbids in the same tained in contact with the carbid after the furnace, and it is adapted to permit access latterhascooledbelowits melting-point,being 25 of the nitrogen to the carbid in the receptacle only cut off when the carbid finally cools to from the time of formation of the carbid unordinary temperatures. til the carbid cools below the point at which The construction of the furnace used for further absorption of nitrogen will take place. carrying out my process may be varied in In the accompanying drawings, Figurelis numerous ways, provided the principle is 0 a side elevation, partly in section, of one form maintained of delivering the gas, in this case of my improved electric furnace. Fig. 2 is a nitrogen, to the moving receptacle at a cervertical section thereof transverse to Fig. 1. tain definite stage of the movement thereof,

Figs. 3 and 4 are respectively a side elevaso as to produce a specific effect, which detion and a plan view of another embodiment pends on the relative position of the receptai 5 of the invention. cle. Thus valves 12 may be arranged in each Referring to Figs. 1 and 2, 1 represents a pipe 8, as indicated in Figs. 3 and 4:, promain shaft supported on bearings 3 and carviding each valve 12 with atappet or lever 13, rying by spokes 2 a rim 4, formed as the inwhich is struck alternately by fixed tappets ner half of an annular drum, removable or lugs 1s 15 on arms or brackets 16 17, re-

o shells or covers 4 being attached to the rim spectively, at opposite sides of the machine, to complete such annular drum, which serves so that the tappet 14: on one side will open as the receptacle for the materials operated each valve as it comes around. The result is upon during the process. In practice these the'same as in the apparatus shown in Fig. 1, shells are attached to the lower half of the and the construction of the apparatus may be 5 rim, being added to one side and removed otherwise the same.

from the other as the wheel-frame 2 3 rotates. Having thus described my invention, what Two carbon terminals 5, with suitable feed- I claim as new therein, and desire to secure by ing devices 5, are located so that the carbons Letters Patent, is may project into the annular receptacle, as 1. An electricfurnace comprisingmeansfor I00 50 indicated in Fig. 1. Means, such as a motor delivering current to the furnace, a movable 6 and gearing 7, are provided for slowly roreceptacle adapted to contain carbid-producdefinite part of the movement thereof, and comprising pipe connections to the different parts of the movable receptacle and valve mechanism adapted to control such pipe connections to admit gas successively through such pipe connections to different parts of the receptacle.

CHARLES S. BRADLEY.

Vvitnessesi J. GREEN, A. P. KNIGHT. 

